Question

I am using Crystal Reports XI R2.

My table has transaction data by date. I have a group set up by day and a summary to give a count of transactions for each day. I also have a running total set to give a year to date count for each day. Of course it resets on a change in year.

My goal is to be able to find the difference between the YTD count yesterday and the same for the same date last year.

Edit: I’ve misstated the goal. It isn’t to be able to find the difference for just yesterday, but for each day in a range of days.

Answer 1

I finally got this nailed down. There is likely a cleaner way of doing this, but….

I converted the dates (started as text yyyy-mm-dd) into text mm/dd/yyyy format:

stringvar yyyyear := {table.dateField}[1 to 4]; 
stringvar mmonth := {table.dateField}[6 to 7];;
stringvar dday := {table.dateField}[9 to 10];

mmonth + "/" + dday + "/" + yyyyear

Grouped by this field and inserted a count summary into the group header. Created a separate field for the mm/dd portion of each date:

{@textDate}[1 to 5]

Added a flag to see if the date in the current group header matched the previous:

if previous({@mm/dd}) = {@mm/dd}
    then 1
else 0

Used a shared variable to store the YTD totals for each year (2 formulas):

shared numbervar totalsCurentYear;

if {@prevDateFlag} = 1 then 
    totalsCurrentYear := totalsCurrentYear + Sum ({@transactionCount}, {@textDate});

totalsCurrentYear

|

shared numbervar totalsLastYear;

if {@prevDateFlag} = 1 then 
    totalsLastYear := totalsLastYear + Sum ({@transactionCount}, {@textDate});

totalsLastYear    

Put both of these into the group footer (suppressed) and added a field to do the subtraction into the group header.